Table 3.
Associations between number of consecutive workdays and days off from work and change in bodily fatigue after work and the following morning presented in minimally and fully adjusted models
| Minimally adjusted model | Fully adjusted model | |||
| LSM | LSM differences | LSM | LSM differences | |
| Estimates | Difference (95% CI) | Estimates | Difference (95% CI) | |
| (A) Workdays | ||||
| After the workday | ||||
| 0–3 workdays | ||||
| 0 | 2.26 | Reference | 2.39 | Reference |
| 1 | 4.33 | 2.07 (1.81 to 2.33)* | 4.45 | 2.06 (1.80 to 2.32)* |
| 2 | 4.10 | 1.84 (1.56 to 2.13)*† | 4.23 | 1.83 (1.55 to 2.12)*† |
| 3 | 4.41 | 2.15 (1.84 to 2.45)* | 4.53 | 2.14 (1.83 to 2.44)* |
| The following morning | ||||
| 0–3 workdays | ||||
| 0 | 2.02 | Reference | 2.02 | Reference |
| 1 | 3.07 | 1.05 (0.81 to 1.29)* | 3.07 | 1.05 (0.80 to 1.29)* |
| 2 | 2.93 | 0.91 (0.65 to 1.17)* | 2.92 | 0.91 (0.64 to 1.17)* |
| 3 | 3.03 | 1.01 (0.73 to 1.29)* | 3.02 | 1.00 (0.72 to 1.29)* |
| (B) Days off work | ||||
| After the workday | ||||
| 0–2 non-workdays | ||||
| 0 | 4.14 | Reference | 4.20 | Reference |
| 1 | 2.32 | −1.82 (−2.02 to −1.61)‡ | 2.38 | −1.82 (−2.03 to −1.61)‡ |
| 2 | 2.15 | −1.99 (−2.24 to −1.75)‡ | 2.20 | −2.00 (−2.25 to −1.75)‡ |
| The following morning | ||||
| 0–2 non-workdays | ||||
| 0 | 3.33 | Reference | 3.31 | Reference |
| 1 | 2.37 | −0.95 (−1.16 to −0.75)‡ | 2.35 | −0.95 (−1.16 to −0.75)‡ |
| 2 | 2.30 | −1.03 (−1.30 to −0.77)‡ | 2.27 | −1.04 (−1.31 to −0.77)‡ |
(A) represents associations between consecutive workdays (0–3 workdays) and change in fatigue after work and the following morning, while (B) represents associations between consecutive days off (0–2 days off) and change in bodily fatigue at the ‘after the workday’ and ‘the following morning’ time points.
Minimally adjusted model: adjusted for age, sex, years of employment, job title, low back pain (LBP) intensity the preceding 4 weeks prior to baseline, chronic LBP and perceived stress during the 2 weeks before baseline.
Fully adjusted model: minimally adjusted model+smoking, leisure-time physical activity, body mass index (BMI), influence at work, access to work tools, role clarity, guidance, community and cohesion between colleagues, recognition, respectful relationship between leader and employees, and fairness.
*Statistically significantly different from 0 workday (reference).
†Tendency towards a statistically significant difference between 2 and 3 consecutive workdays (minimally adjusted model: p=0.093, fully adjusted model: p=0.097).
‡Statistically significantly different from 0 day off (reference).
LSM, least squares means.